what and where are all the air ride component?

Everything is in the rear of the vehicle with-in inches of each other you have the leveler, the air pump, & air lines going to the shocks

in my 97 park avenue it's in the passenger side rear wheel base housing. if you follow the airlines from the shock absorbers that will take you right to the compressor and air dryer. very easy to replace all the components involved. good luck.